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authorMing Lei <ming.lei@redhat.com>2017-05-22 23:05:03 +0800
committerChristoph Hellwig <hch@lst.de>2017-05-22 20:50:09 +0200
commit806f026f9b901eaf1a6baeb48b5da18d6a4f818e (patch)
treebd3f2a2231f29be139c162a596aeddb6de74eade /drivers
parent0544f5494a03b8846db74e02be5685d1f32b06c9 (diff)
nvme: use blk_mq_start_hw_queues() in nvme_kill_queues()
Inside nvme_kill_queues(), we have to start hw queues for draining requests in sw queues, .dispatch list and requeue list, so use blk_mq_start_hw_queues() instead of blk_mq_start_stopped_hw_queues() which only run queues if queues are stopped, but the queues may have been started already, for example nvme_start_queues() is called in reset work function. blk_mq_start_hw_queues() run hw queues in current context, instead of running asynchronously like before. Given nvme_kill_queues() is run from either remove context or reset worker context, both are fine to run hw queue directly. And the mutex of namespaces_mutex isn't a problem too becasue nvme_start_freeze() runs hw queue in this way already. Cc: stable@vger.kernel.org Reported-by: Zhang Yi <yizhan@redhat.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nvme/host/core.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d5e0906262ea..40d5e4a9e8d7 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2437,7 +2437,13 @@ void nvme_kill_queues(struct nvme_ctrl *ctrl)
revalidate_disk(ns->disk);
blk_set_queue_dying(ns->queue);
blk_mq_abort_requeue_list(ns->queue);
- blk_mq_start_stopped_hw_queues(ns->queue, true);
+
+ /*
+ * Forcibly start all queues to avoid having stuck requests.
+ * Note that we must ensure the queues are not stopped
+ * when the final removal happens.
+ */
+ blk_mq_start_hw_queues(ns->queue);
}
mutex_unlock(&ctrl->namespaces_mutex);
}